Cycles: glossy and anisotropic BSDF changes

* Anisotropic BSDF now supports GGX and Beckmann distributions, Ward has been
  removed because other distributions are superior.
* GGX is now the default distribution for all glossy and anisotropic nodes,
  since it looks good, has low noise and is fast to evaluate.
* Ashikhmin-Shirley is now available in the Glossy BSDF.

4 files changed, 24 insertions, 4 deletions

diff --git a/source/blender/nodes/shader/nodes/node_shader_bsdf_anisotropic.c b/source/blender/nodes/shader/nodes/node_shader_bsdf_anisotropic.c
index dd14006cd8a..b9c94fc3aee 100644
--- a/source/blender/nodes/shader/nodes/node_shader_bsdf_anisotropic.c
+++ b/source/blender/nodes/shader/nodes/node_shader_bsdf_anisotropic.c
@@ -44,6 +44,11 @@ static bNodeSocketTemplate sh_node_bsdf_anisotropic_out[] = {
 	{	-1, 0, ""	}
 };
 
+static void node_shader_init_anisotropic(bNodeTree *UNUSED(ntree), bNode *node)
+{
+	node->custom1 = SHD_GLOSSY_GGX;
+}
+
 static int node_shader_gpu_bsdf_anisotropic(GPUMaterial *mat, bNode *UNUSED(node), bNodeExecData *UNUSED(execdata), GPUNodeStack *in, GPUNodeStack *out)
 {
 	if (!in[3].link)
@@ -61,7 +66,7 @@ void register_node_type_sh_bsdf_anisotropic(void)
 	node_type_compatibility(&ntype, NODE_NEW_SHADING);
 	node_type_socket_templates(&ntype, sh_node_bsdf_anisotropic_in, sh_node_bsdf_anisotropic_out);
 	node_type_size_preset(&ntype, NODE_SIZE_MIDDLE);
-	node_type_init(&ntype, NULL);
+	node_type_init(&ntype, node_shader_init_anisotropic);
 	node_type_storage(&ntype, "", NULL, NULL);
 	node_type_gpu(&ntype, node_shader_gpu_bsdf_anisotropic);
 
diff --git a/source/blender/nodes/shader/nodes/node_shader_bsdf_glass.c b/source/blender/nodes/shader/nodes/node_shader_bsdf_glass.c
index a59cbd6f46e..55dafaeca35 100644
--- a/source/blender/nodes/shader/nodes/node_shader_bsdf_glass.c
+++ b/source/blender/nodes/shader/nodes/node_shader_bsdf_glass.c
@@ -42,6 +42,11 @@ static bNodeSocketTemplate sh_node_bsdf_glass_out[] = {
 	{	-1, 0, ""	}
 };
 
+static void node_shader_init_glass(bNodeTree *UNUSED(ntree), bNode *node)
+{
+	node->custom1 = SHD_GLOSSY_BECKMANN;
+}
+
 static int node_shader_gpu_bsdf_glass(GPUMaterial *mat, bNode *UNUSED(node), bNodeExecData *UNUSED(execdata), GPUNodeStack *in, GPUNodeStack *out)
 {
 	if (!in[3].link)
@@ -59,7 +64,7 @@ void register_node_type_sh_bsdf_glass(void)
 	node_type_compatibility(&ntype, NODE_NEW_SHADING);
 	node_type_socket_templates(&ntype, sh_node_bsdf_glass_in, sh_node_bsdf_glass_out);
 	node_type_size_preset(&ntype, NODE_SIZE_MIDDLE);
-	node_type_init(&ntype, NULL);
+	node_type_init(&ntype, node_shader_init_glass);
 	node_type_storage(&ntype, "", NULL, NULL);
 	node_type_gpu(&ntype, node_shader_gpu_bsdf_glass);
 
diff --git a/source/blender/nodes/shader/nodes/node_shader_bsdf_glossy.c b/source/blender/nodes/shader/nodes/node_shader_bsdf_glossy.c
index b8ad5e4fbed..9518784eebe 100644
--- a/source/blender/nodes/shader/nodes/node_shader_bsdf_glossy.c
+++ b/source/blender/nodes/shader/nodes/node_shader_bsdf_glossy.c
@@ -41,6 +41,11 @@ static bNodeSocketTemplate sh_node_bsdf_glossy_out[] = {
 	{	-1, 0, ""	}
 };
 
+static void node_shader_init_glossy(bNodeTree *UNUSED(ntree), bNode *node)
+{
+	node->custom1 = SHD_GLOSSY_GGX;
+}
+
 static int node_shader_gpu_bsdf_glossy(GPUMaterial *mat, bNode *UNUSED(node), bNodeExecData *UNUSED(execdata), GPUNodeStack *in, GPUNodeStack *out)
 {
 	if (!in[2].link)
@@ -58,7 +63,7 @@ void register_node_type_sh_bsdf_glossy(void)
 	node_type_compatibility(&ntype, NODE_NEW_SHADING);
 	node_type_socket_templates(&ntype, sh_node_bsdf_glossy_in, sh_node_bsdf_glossy_out);
 	node_type_size_preset(&ntype, NODE_SIZE_MIDDLE);
-	node_type_init(&ntype, NULL);
+	node_type_init(&ntype, node_shader_init_glossy);
 	node_type_storage(&ntype, "", NULL, NULL);
 	node_type_gpu(&ntype, node_shader_gpu_bsdf_glossy);
 
diff --git a/source/blender/nodes/shader/nodes/node_shader_bsdf_refraction.c b/source/blender/nodes/shader/nodes/node_shader_bsdf_refraction.c
index 5d1bcc81adb..90db7a5771d 100644
--- a/source/blender/nodes/shader/nodes/node_shader_bsdf_refraction.c
+++ b/source/blender/nodes/shader/nodes/node_shader_bsdf_refraction.c
@@ -42,6 +42,11 @@ static bNodeSocketTemplate sh_node_bsdf_refraction_out[] = {
 	{	-1, 0, ""	}
 };
 
+static void node_shader_init_refraction(bNodeTree *UNUSED(ntree), bNode *node)
+{
+	node->custom1 = SHD_GLOSSY_BECKMANN;
+}
+
 static int node_shader_gpu_bsdf_refraction(GPUMaterial *mat, bNode *UNUSED(node), bNodeExecData *UNUSED(execdata), GPUNodeStack *in, GPUNodeStack *out)
 {
 	if (!in[3].link)
@@ -59,7 +64,7 @@ void register_node_type_sh_bsdf_refraction(void)
 	node_type_compatibility(&ntype, NODE_NEW_SHADING);
 	node_type_socket_templates(&ntype, sh_node_bsdf_refraction_in, sh_node_bsdf_refraction_out);
 	node_type_size_preset(&ntype, NODE_SIZE_MIDDLE);
-	node_type_init(&ntype, NULL);
+	node_type_init(&ntype, node_shader_init_refraction);
 	node_type_storage(&ntype, "", NULL, NULL);
 	node_type_gpu(&ntype, node_shader_gpu_bsdf_refraction);